package cpanel

import (
	"encoding/json"
	"net/http"
)

// Handler handles cPanel admin endpoints
type Handler struct {
	client *Client
}

// NewHandler creates a new cPanel handler
func NewHandler() *Handler {
	return &Handler{
		client: NewClient(),
	}
}

// CreateEmailRequest is the request body for creating an email
type CreateEmailRequest struct {
	Email    string `json:"email"`
	Password string `json:"password"`
	Quota    int    `json:"quota"` // MB, 0 = unlimited
}

// ChangePasswordRequest is the request body for changing password
type ChangePasswordRequest struct {
	Password string `json:"password"`
}

// UpdateQuotaRequest is the request body for updating quota
type UpdateQuotaRequest struct {
	Quota int `json:"quota"` // MB
}

// ListEmails godoc
// @Summary      List Email Accounts
// @Description  Returns all email accounts for the cPanel account
// @Tags         Admin - cPanel
// @Accept       json
// @Produce      json
// @Param        domain  query     string  false  "Filter by domain"
// @Success      200     {array}   EmailAccount
// @Failure      500     {string}  string  "Internal Server Error"
// @Security     BearerAuth
// @Router       /api/v1/admin/cpanel/emails [get]
func (h *Handler) ListEmails(w http.ResponseWriter, r *http.Request) {
	domain := r.URL.Query().Get("domain")

	emails, err := h.client.ListEmails(domain)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(emails)
}

// CreateEmail godoc
// @Summary      Create Email Account
// @Description  Creates a new email account
// @Tags         Admin - cPanel
// @Accept       json
// @Produce      json
// @Param        body  body      CreateEmailRequest  true  "Email details"
// @Success      201   {object}  map[string]string
// @Failure      400   {string}  string  "Bad Request"
// @Failure      500   {string}  string  "Internal Server Error"
// @Security     BearerAuth
// @Router       /api/v1/admin/cpanel/emails [post]
func (h *Handler) CreateEmail(w http.ResponseWriter, r *http.Request) {
	var req CreateEmailRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if req.Email == "" || req.Password == "" {
		http.Error(w, "Email and password are required", http.StatusBadRequest)
		return
	}

	if err := h.client.CreateEmail(req.Email, req.Password, req.Quota); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusCreated)
	json.NewEncoder(w).Encode(map[string]string{
		"message": "Email created successfully",
		"email":   req.Email,
	})
}

// DeleteEmail godoc
// @Summary      Delete Email Account
// @Description  Deletes an email account
// @Tags         Admin - cPanel
// @Accept       json
// @Produce      json
// @Param        email  path      string  true  "Email address"
// @Success      200    {object}  map[string]string
// @Failure      400    {string}  string  "Bad Request"
// @Failure      500    {string}  string  "Internal Server Error"
// @Security     BearerAuth
// @Router       /api/v1/admin/cpanel/emails/{email} [delete]
func (h *Handler) DeleteEmail(w http.ResponseWriter, r *http.Request) {
	email := r.PathValue("email")
	if email == "" {
		http.Error(w, "Email is required", http.StatusBadRequest)
		return
	}

	if err := h.client.DeleteEmail(email); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]string{
		"message": "Email deleted successfully",
	})
}

// ChangePassword godoc
// @Summary      Change Email Password
// @Description  Changes the password for an email account
// @Tags         Admin - cPanel
// @Accept       json
// @Produce      json
// @Param        email  path      string                 true  "Email address"
// @Param        body   body      ChangePasswordRequest  true  "New password"
// @Success      200    {object}  map[string]string
// @Failure      400    {string}  string  "Bad Request"
// @Failure      500    {string}  string  "Internal Server Error"
// @Security     BearerAuth
// @Router       /api/v1/admin/cpanel/emails/{email}/password [put]
func (h *Handler) ChangePassword(w http.ResponseWriter, r *http.Request) {
	email := r.PathValue("email")
	if email == "" {
		http.Error(w, "Email is required", http.StatusBadRequest)
		return
	}

	var req ChangePasswordRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if req.Password == "" {
		http.Error(w, "Password is required", http.StatusBadRequest)
		return
	}

	if err := h.client.ChangePassword(email, req.Password); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]string{
		"message": "Password changed successfully",
	})
}

// UpdateQuota godoc
// @Summary      Update Email Quota
// @Description  Updates the disk quota for an email account
// @Tags         Admin - cPanel
// @Accept       json
// @Produce      json
// @Param        email  path      string             true  "Email address"
// @Param        body   body      UpdateQuotaRequest true  "New quota in MB"
// @Success      200    {object}  map[string]string
// @Failure      400    {string}  string  "Bad Request"
// @Failure      500    {string}  string  "Internal Server Error"
// @Security     BearerAuth
// @Router       /api/v1/admin/cpanel/emails/{email}/quota [put]
func (h *Handler) UpdateQuota(w http.ResponseWriter, r *http.Request) {
	email := r.PathValue("email")
	if email == "" {
		http.Error(w, "Email is required", http.StatusBadRequest)
		return
	}

	var req UpdateQuotaRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	if err := h.client.UpdateQuota(email, req.Quota); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(map[string]string{
		"message": "Quota updated successfully",
	})
}